Massac County RainfallUnited StatesILMassac County100%Metropolis 100% Chance 100%Brookport 100% Chance 95%Mermet Lake 95% Chance Big BayBoazBrookportCretaceous Hills Nature PreserveFort Massac State ParkHillermanJoppaMassac Forest Nature PreserveMermetMermet LakeMetropolisMetropolis Municipal AirportNew ColumbiaRound KnobSamothShady GroveUnionville